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Wiring a Signaling Line Circuit (SLC) Installation
IQ-301 PN 50036:F 10/29/2001 41
2.9 Wiring a Signaling Line Circuit (SLC)
2.9.1 Overview of SLC Wiring
Communication between the control panel and intelligent and addressable initiating,
monitor, and control devices takes place through a Signaling Line Circuit (SLC). You
can wire an SLC to meet the requirements of NFPA Style 4, Style 6, or Style 7 circuits.
This section covers the topics outlined in Table 9:
Table 9 SLC Wiring Topics
Topics Refer to
Setting an Address for a
monitor, control, or relay
module Figure 22.
Methods for terminating
wiring leaving the
control panel “SLC Shield Termination” on page 43.
Wire Requirements for
a Two-wire SLC “Wire Requirements for a Two-wire SLC” on page 45, which covers:
• Loop resistance for a Two-wire SLC.
• Total wiring length for a Two-wire SLC.
• Typical Wiring for a Two-wire SLC.
Wire Requirements for
a Four-wire SLC “Wire Requirements for a Four-wire SLC” on page 46, which covers:
• Loop resistance for a Four-wire SLC.
• Total wiring length for a Four-wire SLC.
• Typical Wiring for a Four-wire SLC.
Wiring an ISO-X
Isolator Module “Wiring an Isolator Module (ISO-X)” on page 49, which covers:
• Description of an ISO-X Module
• Isolating a Branch of a Two-wire SLC
Wiring a Conventional
Initiating Device Circuit
(IDC) “Wiring an IDC with Monitor Modules” on page 50, which covers:
• Description of Monitor Modules
• Wiring a Two-wire or Four-wire IDC.
Wiring Notification
Appliance Circuits
(NACs) “SLC Wiring with Control Modules” on page 57, which covers:
• Description of control/relay modules
• Wiring a Relay Module
• Wiring a Control Module
• Wiring a Two-wire NAC (Style Y)
• Wiring a Four-wire NAC (Style Z)
Wiring an Intelligent
Detector “SLC Wiring with an Intelligent Detector” on page 59
Wiring an Addressable
Manual Pull Station “SLC Wiring with an NBG-12LX Addressable Manual Pull Station”
on page 60